Respirator cartridge



FIG. 1 is a perspective view showing the new design for a respirator cartridge;

FIG. 2 is a top view thereof, the bottom being a mirror image thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof

FIG. 5 is a rear view thereof; and,

FIG. 6 is a left side view thereof.

The broken lines in the drawings illustrate portions of the respirator cartridge that form no part of the claimed design. 

CLAIM The ornamental design for a respirator cartridge, as shown and described. 